I think that there's kinda four ways of going about it. 1) The official way (both players declare Factions but might end up fielding whoever Master and whatever crew), 2) declaring Masters and then choosing crews, 3) one player choosing a Master, then the other one choosing a Master and then building crews or, if I understood you correctly, 4) one player choosing Master and crew and then the other player doing the same. And I think that these are in the order of balance with 1) being the most balanced and 4) being the least. In Gencon they played so that you first declared your Master (simultaneously, I believe) and only then chose the crew. Some Masters are very synergistic with their particular crew so you will know what you will face while others can take really whatever. If you are going against, say, Kirai, you will know to load up on casting attacks to bypass Incorporeal. If you're going against Molly, it might also mean lots of Incorporeal Spirits but it might also mean Horrors, so the choice of taking damaging Casting attacks isn't as clear-cut anymore. If you're going against Outcasts, you might come up against anything really, but if you're going up against Hamelin, you'll know what to expect (most of the time) and, for example, take more blasts than you otherwise would. Or Vickies - better not take a force that needs to bunch up. Or, to bring this back to the topic of the thread, if you know which Master you are facing but are allowed to choose your own Master, you will likely choose Lilith over Pandora to go against Rasputina.